How do we know that grace is the only means of salvation?

Ephesians 2:8-9 clearly states, 'For by grace you have been saved through faith, and that not of yourselves; it is the gift of God, not of works, lest anyone should boast.' This establishes grace as the unmerited favor of God bestowed upon sinners, emphasizing that no human works contribute to one's salvation. Additionally, the parable of the dragnet shows how God sovereignly draws individuals to Himself, highlighting that it is by His grace alone that His chosen people are saved. The transformative work of the Holy Spirit empowers believers to respond to the gospel, confirming that it is God's grace that enables faith and repentance.